Results 11 to 20 of about 39,281 (265)

Maternal physical activity affects yolk sac size and growth in early pregnancy, but girls and boys use different strategies

Scientific Reports, 2023
This longitudinal study investigated the impact of actigraphy-measured maternal physical activity on yolk sac size during early development. The yolk sac, a transient extraembryonic organ, plays a crucial role in embryonic development and is involved in ...
Alexander Vietheer, Torvid Kiserud, Cathrine Ebbing, Hemamaalini Rajkumar, Øystein Ariansen Haaland, Rolv Terje Lie, Roberto Romero, Jörg Kessler   +7 more
doaj   +1 more source

Change of zinc mobilization and gene expression of key zinc transport proteins between the yolk sac membrane and liver of duck embryonic developing

Poultry Science, 2022
: Zinc (Zn) deposition in egg yolk is essential for the rapid growth and complete development of the avian embryo. Thus, it is crucial to obtain maximal Zn mobilization at an appropriate time during development in favor of the survival of avian embryos ...
S.P. Bai, W. Gao, T. Yuan, X.Y. Ma, L.J. He, L. Huang, S. Wei, C. Liu, W.C. Wang, L. Yang, Y.W. Zhu   +10 more
doaj   +1 more source

Visceral endoderm expression of Yin-Yang1 (YY1) is required for VEGFA maintenance and yolk sac development. [PDF]

PLoS ONE, 2013
Mouse embryos lacking the polycomb group gene member Yin-Yang1 (YY1) die during the peri-implantation stage. To assess the post-gastrulation role of YY1, a conditional knock-out (cKO) strategy was used to delete YY1 from the visceral endoderm of the yolk
Siyeon Rhee, Mara-Isel Guerrero-Zayas, Mary C Wallingford, Pablo Ortiz-Pineda, Jesse Mager, Kimberly D Tremblay   +5 more
doaj   +1 more source

Extragonadal yolk sac tumor of the ureter with neuroendocrine differentiation: A case report. [PDF]

Urol Case Rep
Takanashi M, Kumagai J, Murakami T.
europepmc   +2 more sources

Primary Nasopharngeal Yolk Sac Tumor: A Case Report [PDF]

Journal of Clinical and Diagnostic Research, 2016
Yolk sac tumour also known as primitive endodermal tumour is the most common malignant germ cell tumour (GCT) in the paediatric age group. Most common sites of involvement are ovaries and testes, but rarely can occur in the extragonadal sites.
Dhanalakshmi Arumugam, Pavithra Thandavarayan, Lalitha Chidambaram, Sudha Boj, Sumathi Marudasalam   +4 more
doaj   +1 more source

Pure primary yolk sac tumor of the endometrium tends to occur at a younger age: A case report and literature analysis

SAGE Open Medical Case Reports, 2021
We present a case of primary yolk sac tumor of the endometrium. This rare tumor occurred in a 43-year-old woman with a pure primary yolk sac tumor. The tumor resembled yolk sac tumor morphology of the ovary.
Huijuan Ge, Rui Bi
doaj   +1 more source

Urachal yolk sac tumor penetrating the bladder as a diagnostic challenge: a case report and review of the literature

Diagnostic Pathology, 2022
Background Yolk sac tumor (YST) is a germ cell tumor. It is primarily located in the gonads but can also occur extragonadally (extragonadal yolk sac tumor - EGYST), most commonly in the pelvis, retroperitoneum or mediastinum.
Vladimír Šámal, Tomáš Jirásek, Vít Paldus, Igor Richter, Ondřej Hes   +4 more
doaj   +1 more source

KIT Is Required for Fetal Liver Hematopoiesis

Frontiers in Cell and Developmental Biology, 2021
In the mouse embryo, endothelial cell (EC) progenitors almost concomitantly give rise to the first blood vessels in the yolk sac and the large vessels of the embryo proper.
Alessandro Fantin, Alessandro Fantin, Carlotta Tacconi, Emanuela Villa, Elena Ceccacci, Laura Denti, Christiana Ruhrberg   +6 more
doaj   +1 more source

Cushing’s syndrome caused by ACTH precursors secreted from a pancreatic yolk sac tumor in an adult—a case report and literature review

Frontiers in Medicine, 2023
Here, we report the first adult case of pancreatic yolk sac tumor with ectopic adrenocorticotropic hormone (ACTH) syndrome. The patient was a 27-year-old woman presenting with abdominal distension, Cushingoid features, and hyperpigmentation.
Johnny Yau Cheung Chang, Chariene Shao Lin Woo, Wing Sun Chow, Anne White, Ka Chung Wong, Po Tsui, Alan Chun Hong Lee, Eunice Ka Hong Leung, Yu Cho Woo, Kathryn Choon Beng Tan, Karen Siu Ling Lam, Chi Ho Lee, David Tak Wai Lui   +12 more
doaj   +1 more source

Which parameters – rates of survival or growth – determine the best moment for stocking trout larvae?

Archives of Polish Fisheries, 2015
The aim of this study was to determine the best moment to stock trout, Salmo trutta L., larvae into the wild. This goal was accomplished by determining weekly changes in the growth parameters of larvae that were fed in seven variants: on the day of 2/3 ...
Domagała Józef, Czerniawski Robert, Pilecka-Rapacz Małgorzata   +2 more
doaj   +1 more source